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yaml --- r: 184706 b: refs/heads/master c: 2f70a1e h: refs/heads/master v: v3
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Vimal Singh
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Tony Lindgren
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Feb 15, 2010
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| Original file line number | Diff line number | Diff line change |
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| --- | ||
| refs/heads/master: 30e53bccfa15c6c0839c87705a66d478bb10baf5 | ||
| refs/heads/master: 2f70a1e93657bea0baa7d449aa49e44a08582dc8 |
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| /* | ||
| * gpmc-nand.c | ||
| * | ||
| * Copyright (C) 2009 Texas Instruments | ||
| * Vimal Singh <vimalsingh@ti.com> | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License version 2 as | ||
| * published by the Free Software Foundation. | ||
| */ | ||
|
|
||
| #include <linux/kernel.h> | ||
| #include <linux/platform_device.h> | ||
| #include <linux/io.h> | ||
|
|
||
| #include <asm/mach/flash.h> | ||
|
|
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| #include <plat/nand.h> | ||
| #include <plat/board.h> | ||
| #include <plat/gpmc.h> | ||
|
|
||
| #define WR_RD_PIN_MONITORING 0x00600000 | ||
|
|
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| static struct omap_nand_platform_data *gpmc_nand_data; | ||
|
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| static struct resource gpmc_nand_resource = { | ||
| .flags = IORESOURCE_MEM, | ||
| }; | ||
|
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| static struct platform_device gpmc_nand_device = { | ||
| .name = "omap2-nand", | ||
| .id = 0, | ||
| .num_resources = 1, | ||
| .resource = &gpmc_nand_resource, | ||
| }; | ||
|
|
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| static int omap2_nand_gpmc_retime(void) | ||
| { | ||
| struct gpmc_timings t; | ||
| int err; | ||
|
|
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| memset(&t, 0, sizeof(t)); | ||
| t.sync_clk = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->sync_clk); | ||
| t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on); | ||
| t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on); | ||
|
|
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| /* Read */ | ||
| t.adv_rd_off = gpmc_round_ns_to_ticks( | ||
| gpmc_nand_data->gpmc_t->adv_rd_off); | ||
| t.oe_on = t.adv_on; | ||
| t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access); | ||
| t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off); | ||
| t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off); | ||
| t.rd_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle); | ||
|
|
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| /* Write */ | ||
| t.adv_wr_off = gpmc_round_ns_to_ticks( | ||
| gpmc_nand_data->gpmc_t->adv_wr_off); | ||
| t.we_on = t.oe_on; | ||
| if (cpu_is_omap34xx()) { | ||
| t.wr_data_mux_bus = gpmc_round_ns_to_ticks( | ||
| gpmc_nand_data->gpmc_t->wr_data_mux_bus); | ||
| t.wr_access = gpmc_round_ns_to_ticks( | ||
| gpmc_nand_data->gpmc_t->wr_access); | ||
| } | ||
| t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off); | ||
| t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off); | ||
| t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle); | ||
|
|
||
| /* Configure GPMC */ | ||
| gpmc_cs_write_reg(gpmc_nand_data->cs, GPMC_CS_CONFIG1, | ||
| GPMC_CONFIG1_DEVICESIZE(gpmc_nand_data->devsize) | | ||
| GPMC_CONFIG1_DEVICETYPE_NAND); | ||
|
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| err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t); | ||
| if (err) | ||
| return err; | ||
|
|
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| return 0; | ||
| } | ||
|
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| static int gpmc_nand_setup(void) | ||
| { | ||
| struct device *dev = &gpmc_nand_device.dev; | ||
|
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| /* Set timings in GPMC */ | ||
| if (omap2_nand_gpmc_retime() < 0) { | ||
| dev_err(dev, "Unable to set gpmc timings\n"); | ||
| return -EINVAL; | ||
| } | ||
|
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| return 0; | ||
| } | ||
|
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| int __init gpmc_nand_init(struct omap_nand_platform_data *_nand_data) | ||
| { | ||
| unsigned int val; | ||
| int err = 0; | ||
| struct device *dev = &gpmc_nand_device.dev; | ||
|
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| gpmc_nand_data = _nand_data; | ||
| gpmc_nand_data->nand_setup = gpmc_nand_setup; | ||
| gpmc_nand_device.dev.platform_data = gpmc_nand_data; | ||
|
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| err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE, | ||
| &gpmc_nand_data->phys_base); | ||
| if (err < 0) { | ||
| dev_err(dev, "Cannot request GPMC CS\n"); | ||
| return err; | ||
| } | ||
|
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| err = gpmc_nand_setup(); | ||
| if (err < 0) { | ||
| dev_err(dev, "NAND platform setup failed: %d\n", err); | ||
| return err; | ||
| } | ||
|
|
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| /* Enable RD PIN Monitoring Reg */ | ||
| if (gpmc_nand_data->dev_ready) { | ||
| val = gpmc_cs_read_reg(gpmc_nand_data->cs, | ||
| GPMC_CS_CONFIG1); | ||
| val |= WR_RD_PIN_MONITORING; | ||
| gpmc_cs_write_reg(gpmc_nand_data->cs, | ||
| GPMC_CS_CONFIG1, val); | ||
| } | ||
|
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| err = platform_device_register(&gpmc_nand_device); | ||
| if (err < 0) { | ||
| dev_err(dev, "Unable to register NAND device\n"); | ||
| goto out_free_cs; | ||
| } | ||
|
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| return 0; | ||
|
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| out_free_cs: | ||
| gpmc_cs_free(gpmc_nand_data->cs); | ||
|
|
||
| return err; | ||
| } |
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